哪个类在基类的构造函数中getClass（）报告

问题描述

在Java中，可以放心地假设在用作基类的类的构造函数中调用 getClass（）将提供有关派生类的信息，而不是基类的类？

In Java, is it safe to assume that getClass() called inside a constructor of a class used as a base class will provide information about the derived class, rather than the class of the base class?

它似乎工作，但我想这不一定意味着它的安全。
例如，如果我有以下两个类：

It seems to work, but I guess that doesn't necessarily mean it's safe.For example, if I have the following two classes:

public class Parent {
    public Parent() {
        System.out.println(getClass().getName());
    }
}

和：

public class Derived extends Parent {
    public Derived() {
        super();
    }

    public static void main(String... args) {
        new Derived();
    }
}

当我运行 main （）方法在它打印的Derived类中： Derived （这是我希望的）。但是我可以依靠JVM上的这种行为吗？

When I run the main() method in the Derived class it prints: Derived (which is what I was hoping). But can I rely on that behavior across JVMs?

推荐答案

getClass Object 的方法之一的运行时类：

code>派生。

So yes, it will always return Derived.

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